DOPPLER ARTERIAL LOWER LIMB - RIGHT ULTRASOUND SCAN

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About The Test

  • Purpose: Map the speed and direction of blood flow in arteries from groin to ankle
  • Non-invasive: No needles, no incisions
  • Radiation-free: Uses harmless sound waves, safe for pregnant women and children

What is a Doppler Arterial Lower Limb - Right Ultrasound Scan?

Doppler ultrasound measures how red blood cells move through your arteries.
A small handheld probe (transducer) sends high-frequency sound waves into the right leg. As the waves bounce back, a computer converts them into colour images and audible sounds that reveal:

  • Narrowed areas (stenosis)
  • Blocked vessels (occlusion)
  • Abnormal waveforms suggesting poor perfusion

Types of Doppler Arterial Lower Limb - Right Ultrasound Scan

Type What It Shows Use Case
Color Doppler Direction & speed of blood flow in colour Quick overview of blockages
Power Doppler Low-velocity flow in small vessels Detects collateral circulation
Spectral Doppler Waveform graphics (PSV, EDV, RI) Quantifies degree of stenosis

List of Parameters

We record:

  • Peak Systolic Velocity (PSV) – highest speed during heart contraction
  • End-Diastolic Velocity (EDV) – residual speed when heart relaxes
  • Resistive Index (RI) – (PSV-EDV)/PSV; high RI indicates distal obstruction
  • Ankle-Brachial Index (ABI) – ankle systolic pressure ÷ arm systolic pressure; <0.9 suggests PAD

Why This Test

  • Evaluate unexplained leg pain or cramps
  • Monitor known peripheral artery disease (PAD) for progression
  • Check patency of bypass grafts or stents post-surgery

When to Take Test

See Cadabams Diagnostics if you have:

  • Leg pain or cramping while walking (intermittent claudication)
  • Cold, pale, or bluish foot
  • Slow-healing ulcers or wounds on toes
    High-risk groups:
  • Diabetes mellitus
  • Smokers (current or former)
  • Hypertension or high cholesterol
  • History of heart disease or stroke

Benefits

Benefits of Taking the Doppler Arterial Lower Limb - Right Ultrasound Scan

  • Early detection of blockages before gangrene or amputation
  • Guides treatment planning: angioplasty, medication, lifestyle changes
  • Prevents limb-threatening complications by timely intervention

Illnesses Diagnosed with Doppler Arterial Lower Limb - Right Ultrasound Scan

  • Peripheral Artery Disease (PAD)
  • Arterial stenosis or occlusion
  • Diabetic vasculopathy
  • Popliteal artery entrapment syndrome

Preparing for test

  • Fasting: Usually not required
  • Clothing: Wear loose shorts or skirt; you may need to undress from waist down
  • Skin: Remove lotions, oils, or talcum powder from the right leg

Pre-requisites Doppler Arterial Lower Limb - Right Ultrasound Scan

  • Bring a list of current medications
  • Inform staff of recent vascular surgery or stents
  • Notify if you have open ulcers or wounds so we can cover them properly

Best Time to Take the Doppler Arterial Lower Limb - Right Ultrasound Scan

  • Morning slots reduce leg swelling from daily activity
  • When symptoms flare up—pain, cramping, or colour changes—yields most accurate results

Eligibility

  • Adults aged 18 and above with leg symptoms or risk factors
  • Elderly patients (no upper age limit)
  • Pregnant women (safe for mother and foetus)
  • Not ideal for patients with extensive leg casts that block access

Procedure for Taking a Doppler Arterial Lower Limb - Right Ultrasound Scan

Step 1: Lie flat on the examination table; legs slightly apart
Step 2: A warm gel is applied to the right groin, thigh, knee, and ankle
Step 3: The transducer is glided along the skin; you’ll hear whooshing sounds
Step 4: Gentle pressure checks each artery segment; total time 20–30 minutes


Caution Before Taking the Test

  • Tell the technician about non-healing ulcers—we’ll use sterile gel
  • Mention recent angioplasty or bypass so we avoid fresh incisions
  • Bring compression stockings you wear daily; we may ask you to remove them

Test Results

Results and Interpretations

FindingWhat It MeansClinical Significance
Normal triphasic waveformHealthy, elastic arteryNo action needed
Biphasic/monophasic waveformEarly to moderate stenosisLifestyle changes ± medication
Raised PSV (>180 cm/s)>50 % stenosisMay need angiography
Absent flow signalTotal occlusionUrgent vascular referral
ABI <0.9Peripheral artery diseaseRisk factor modification

Risks & Limitations

Minimal Risks

  • No radiation exposure
  • No iodine contrast dye, so no allergy risk

Possible Limitations

  • Operator dependency: Accuracy depends on technician skill
  • Obesity: Extra tissue can scatter sound waves
  • Severe calcification: Hardened arteries may hide true flow

FAQs

How long does the scan take?

About 20–30 minutes from check-in to check-out.

Is the test painful?

No. You may feel gentle pressure from the probe—no needles or incisions.

Do I need to stop medications beforehand?

Generally no. Continue blood thinners, diabetes, or hypertension drugs unless told otherwise.

When will I get the results?

Same day for routine scans; critical findings are shared immediately.

Can I drive home after the scan?

Yes. There are no sedatives or restrictions on driving.

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